Hola a todos. En esta publicación traemos una caso de configuración para el protocolo BGP, espero lo encuentren interesante.
Condiciones
Las conexiones se establecen entre Switch A y Switch B, y entre Switch B y Switch C. Se requiere que AS 20 no anuncie las rutas anunciadas por AS 10 a AS 30..
Procedimiento
Configurar VLANs correspondientes
<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] vlan batch 10 20
[SwitchA] interface gigabitethernet 1/0/0
[SwitchA-GigabitEthernet1/0/0] port link-type trunk
[SwitchA-GigabitEthernet1/0/0] port trunk allow-pass vlan 10
[SwitchA-GigabitEthernet1/0/0] quit
[SwitchA] interface gigabitethernet 2/0/0
[SwitchA-GigabitEthernet2/0/0] port link-type trunk
[SwitchA-GigabitEthernet2/0/0] port trunk allow-pass vlan 20
[SwitchA-GigabitEthernet2/0/0] quit
La configuración del Switch B y del Switch C son similares.
Assign an IP address to each VLANIF interface.
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] ip address 10.1.1.1 24
[SwitchA-Vlanif10] quit
[SwitchA] interface vlanif 20
[SwitchA-Vlanif20] ip address 192.168.2.1 24
[SwitchA-Vlanif20] quit
La configuración del Switch B y Switch C, son similares a la del Switch A.
# Switch A
[SwitchA] bgp 10
[SwitchA-bgp] router-id 172.16.1.1
[SwitchA-bgp] peer 192.168.2.2 as-number 20
[SwitchA-bgp] ipv4-family unicast
[SwitchA-bgp-af-ipv4] network 10.1.1.0 255.255.255.0
[SwitchA-bgp-af-ipv4] quit
[SwitchA-bgp] quit# Configure SwitchB.
[SwitchB] bgp 20
[SwitchB-bgp] router-id 172.16.2.2
[SwitchB-bgp] peer 192.168.2.1 as-number 10
[SwitchB-bgp] peer 192.168.3.2 as-number 30
[SwitchB-bgp] quit# Configure SwitchC.
[SwitchC] bgp 30
[SwitchC-bgp] router-id 172.16.3.3
[SwitchC-bgp] peer 192.168.3.1 as-number 20
[SwitchC-bgp] quit# Check the routing table of SwitchB.
[SwitchB] display bgp routing-table 10.1.1.0
BGP local router ID : 172.16.2.2
Local AS number : 20
Paths: 1 available, 1 best, 1 select
BGP routing table entry information of 10.1.1.0/24:
From: 192.168.2.1 (172.16.1.1)
Route Duration: 00h00m15s
Direct Out-interface: Vlanif2
Original nexthop: 192.168.2.1
Qos information : 0x0
AS-path 10, origin igp, MED 0, pref-val 0, valid, external, best, select, active, pre 255
Advertised to such 2 peers:
192.168.2.1
192.168.3.2
# Revisar tabla de enrutamiento del Switch C
[SwitchC] display bgp routing-table
BGP Local router ID is 172.16.3.3
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Total Number of Routes: 1
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.11.1.0/24 192.168.3.1 0 20 10i
El switch C ha aprendido la ruta de destino del Switch B
# Configurar routing policy en SwitchA para habilitar SwitchB
[SwitchA] route-policy comm_policy permit node 10
[SwitchA-route-policy] apply community no-export
[SwitchA-route-policy] quit# Apply routing policies.
[SwitchA] bgp 10
[SwitchA-bgp] ipv4-family unicast
[SwitchA-bgp-af-ipv4] peer 192.168.2.2 route-policy comm_policy export
[SwitchA-bgp-af-ipv4] peer 192.168.2.2 advertise-community# Check the routing table of SwitchB.
[SwitchB] display bgp routing-table 10.1.1.0
BGP local router ID : 172.16.2.2
Local AS number : 20
Paths: 1 available, 1 best, 1 select
BGP routing table entry information of 10.1.1.0/24:
From: 192.168.2.1 (172.16.1.1)
Route Duration: 00h00m33s
Direct Out-interface: Vlanif20
Original nexthop: 192.168.2.1
Qos information : 0x0
Community:no-export
AS-path 10, origin igp, MED 0, pref-val 0, valid, external, best, select, activ
e, pre 255
Archivos de configuración
Archivo de configuración de Switch A
#
sysname SwitchA
#
vlan batch 10 20
#
interface Vlanif10
ip address 10.1.1.1 255.255.255.0
#
interface Vlanif20
ip address 192.168.2.1 255.255.255.0
#
interface GigabitEthernet1/0/0
port link-type trunk
port trunk allow-pass vlan 10
#
interface GigabitEthernet2/0/0
port link-type trunk
port trunk allow-pass vlan 20
#
bgp 10
router-id 172.16.1.1
peer 192.168.2.2 as-number 20
#
ipv4-family unicast
undo synchronization
network 10.1.1.0 255.255.255.0
peer 192.168.2.2 enable
peer 192.168.2.2 route-policy comm_policy export
peer 192.168.2.2 advertise-community
#
route-policy comm_policy permit node 10
apply community no-export
#
returnConfiguration file of SwitchB
#
sysname SwitchB
#
vlan batch 20 30
#
interface Vlanif20
ip address 192.168.2.2 255.255.255.0
#
interface Vlanif30
ip address 192.168.3.1 255.255.255.0
#
interface GigabitEthernet2/0/0
port link-type trunk
port trunk allow-pass vlan 20
#
interface GigabitEthernet3/0/0
port link-type trunk
port trunk allow-pass vlan 30
#
bgp 20
router-id 172.16.2.2
peer 192.168.2.1 as-number 10
peer 192.168.3.2 as-number 30
#
ipv4-family unicast
undo synchronization
peer 192.168.2.1 enable
peer 192.168.3.2 enable
#
returnConfiguration file of SwitchC
#
sysname SwitchC
#
vlan 30
#
interface Vlanif30
ip address 192.168.3.2 255.255.255.0
#
interface GigabitEthernet3/0/0
port link-type trunk
port trunk allow-pass vlan 30
#
bgp 30
router-id 172.16.3.3
peer 192.168.3.1 as-number 20
#
ipv4-family unicast
undo synchronization
peer 192.168.3.1 enable
#
return
